Classifications

• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
  • H01M10/00—Secondary cells; Manufacture thereof
  • H01M10/06—Lead-acid accumulators
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
  • H01M10/00—Secondary cells; Manufacture thereof
  • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
  • H01M10/4242—Regeneration of electrolyte or reactants
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
  • H01M10/00—Secondary cells; Manufacture thereof
  • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
  • H01M10/4235—Safety or regulating additives or arrangements in electrodes, separators or electrolyte
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
  • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
  • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
  • Y02E60/10—Energy storage using batteries
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
  • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
  • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
  • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product

Definitions

• the invention relates to a lead accumulator with a supply of expander material arranged in the electrolyte, from which the expander can be supplied at least during part of the life of the accumulator.
• Expander additives to the negative active mass are supposed to counteract the formation of compact lead crystals by disturbing the lead deposition during charging and thereby maintain the highly porous structure of the electrode plates.
• Suitable expanders materials are barium sulfate, high molecular weight organic Substanzen., Li g ninderivate, or dyes, such as alizarin from the series of Oxyanthrachinone.
• the amount of expansion agent in the negative mass is initially sufficient for a few hundred cycles.
• the invention is therefore based on the object of making a stock for the expander material in such a way that the expander stock is protected from consumption at least in the early stage of the battery life and is only gradually released from a later point in time, according to the actual need.
• the object is achieved in that the expander supply is separated from the electrolyte by a barrier material which is slowly dissolved in the electrolyte and releases the expander after a predetermined period of time.
• the barrier material in the sulfuric acid-containing environment is permanently exposed to corrosive alternating stress.
• This environment primarily causes an oxidative degradation of the barrier material, which initially forms an impermeable wall between the spreading agent and the electrolyte.
• the barrier only after a certain time of action of the degrading forces will the barrier be weakened to the point that it breaks open in places and the expander material, which is no longer protected there, is caught by the sulfuric acid, oxidizes and begins to dissolve. Due to the progressive destruction of the wall, the subsequent delivery of expander material to both electrode polarities is increasingly flowing, so that a good current carrying capacity and mass utilization are at least for another. Part of the battery life is secured.
• An advantageous wall material for the expander according to the invention depot is plastic.
• plastic encompasses the entirety of all synthetic resin products that are conditionally stable in a sulfuric acid environment, both pure polymers and copolymers or graft polymers.
• the products can also have a wide variety of levels of corrosion resistance due to the addition of plasticizers and stabilizers, so that a user has a wide range of options when it comes to selecting a suitable wall material.
• the degree of polymerization of the plastic can be regarded as a major factor influencing the rate of corrosion of a plastic.
• a low polymer resin product decomposes faster than a high polymer product with a correspondingly high molecular weight.
• the decomposition time of a plastic which is ultimately also determined by the wall thickness, can be between a few months and many years.
• plastics which can be used according to the invention are: polyvinyl chloride, polysulfone, epoxy resins, polyethylene terephthalate, polybutylene terephthalate, polyethylene, polypropylene, polytetrafluoroethylene, polytrifluorochloroethylene.
• Another cheap wall material for the expander depot according to the invention can be a metal, since the corrosion attack is relatively uniform and defined. However, one will preferably select those metals which ar g or not deleteriously affect the electrochemical behavior of the cell either negligibly. It is particularly advantageously located in a lead-acid battery from this point of lead, antimony or tin use binary and ternary Legierun- g s of these metals with einoe liability.
• an antimony membrane would have the additional advantage that the expander depot also acts as an antimony depot, as antimony in the form of antimony-containing 3- and 5-valent anions (SbOSO 4 - , [H 5n-5 Sb n O 5n ] 5- ) migrates to the electrodes and at least advantageously influences the behavior of the positive electrode.
• the electrode grids consist of an antimony-free alloy, e.g. lead Calcium, which is cheap due to high hydrogen overvoltage, has shown that the positive electrodes tend to increase sludge formation, a disadvantage that grid plates with antimony-containing alloy grids do not have due to a sufficient presence of antimony in the active positive mass.

Landscapes

• Engineering & Computer Science (AREA)
• Manufacturing & Machinery (AREA)
• Chemical & Material Sciences (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Electrochemistry (AREA)
• General Chemical & Material Sciences (AREA)
• Battery Electrode And Active Subsutance (AREA)
• Secondary Cells (AREA)

Applications Claiming Priority (2)

Publications (2)

Family

ID=6161958

Family Applications (1)

Country Status (5)

Cited By (5)

Families Citing this family (3)

Citations (5)

• 1982
  • 1982-04-26 DE DE19823215489 patent/DE3215489A1/de not_active Withdrawn
  • 1982-11-30 DE DE8282111064T patent/DE3274036D1/de not_active Expired
  • 1982-11-30 EP EP82111064A patent/EP0092604B1/fr not_active Expired
• 1983
  • 1983-04-12 FI FI831214A patent/FI831214L/fi not_active Application Discontinuation
  • 1983-04-22 CA CA000426472A patent/CA1187931A/fr not_active Expired
  • 1983-04-25 JP JP58071570A patent/JPS58198869A/ja active Pending

Patent Citations (5)

Non-Patent Citations (1)

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